From
http://en.wikipedia.org/wiki/Coins_...dian_dollar."The Canadian Coin News publication printed an article showing a well-worn 1911 50ยข example that did have the "DEI GRA" abbreviation.[6] This coin has not yet been certified as genuine, having been rejected by ICCS, the popular Canadian grading company."
6. ^ Canadian Coin News, Trajan Publishing Corporation, December 2005